Rink v. Cheminova, Inc.

United States Court of Appeals for the Eleventh Circuit · Torts

TortsProducts liabilityExpert evidenceCausationSummary judgmentClass actionsDaubertRule 702

Facts

After a medfly infestation was discovered in Florida, state and federal officials purchased Fyfanon malathion pesticide from Cheminova and sprayed a malathion-protein bait mixture over the Tampa area. The plaintiffs alleged that before delivery the Fyfanon had been improperly stored above the recommended 77 degrees Fahrenheit, causing decomposition into elevated isomalathion, which is particularly toxic to humans. To prove defect and causation, plaintiffs relied on Dr. Jack Matson, who reconstructed storage temperatures using weather data, transposed data across storage sites, added eighteen degrees to temperature estimates, and then used those figures to estimate isomalathion levels. The district court excluded Matson as methodologically unreliable and then excluded the toxicologists and treating physicians whose opinions depended on his conclusions.

Issue

Did the district court abuse its discretion by excluding the plaintiffs' experts under Daubert, and if not, was summary judgment proper because the remaining evidence did not establish causation for the negligence and strict products liability claims? The appeal also raised whether denial of a continuance and refusal to certify a class were erroneous.

Rule

Under Federal Rule of Evidence 702 and Daubert, expert testimony is admissible only if the proponent shows by a preponderance of the evidence that the expert is qualified, that the methodology is sufficiently reliable, and that the testimony will assist the trier of fact. In assessing reliability, courts may consider whether the method is testable, peer reviewed, has a known error rate, and is generally accepted, but those factors are not exclusive and the district court has substantial discretion in how to evaluate reliability. In negligence and strict products liability cases, causation requires proof that the alleged defect or breach proximately caused the injury; without reliable evidence of the alleged defect, downstream medical causation testimony is irrelevant, and differential diagnosis alone is insufficient to prove causation at summary judgment.

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One of 10 multiple-choice questions for this case. Pick an answer to see why.

Residents of Phoenix sue Desert Vale Crop Solutions after a mosquito-control chemical was sprayed over several neighborhoods. Their chemical-engineering expert estimates contaminant levels by taking temperature readings from one warehouse in Yuma, assuming the same conditions existed at storage depots in Tucson and Mesa, and then adding a fixed 15-degree increase based on a single employee's report that one drum felt hot to the touch.

If the manufacturer moves to exclude the expert under Federal Rule of Evidence 702, how should the court most likely rule?

Explanation. The testimony should be excluded. The majority opinion permits a district court to reject an expert whose methodology relies on conjectural transposition of data from one site to another and unsupported temperature increases that create too great an analytical gap between data and conclusion. The problem is methodological unreliability, not merely competing interpretation. (Derived from Rink v. Cheminova, Inc. (n.d.).)